It looks like we've been misidentifying Ten-lined June Beetles
in the West.
I haven't sorted through the particulars, yet, but ours should
be Polyphylla crinita rather than Polyphylla decemlineata.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1036&context=museumbulletin
fide Andrew Smith on iNaturalist...
--
Mike Patterson
Astoria, OR
I don't know...
http://www.surfbirds.com/community-blogs/northcoastdiaries/?p=3924